I am considering these for my M&P or M&P9c or Shield. Anybody else use them and like/hate them?

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Bought them for my two Shields. Really liked them. Then a couple of years later the orange circle on the front one came off. I called
Ameriglo. The guy I was talking to told me to sen them a photo.
In the same email exchange___I did! Then he said maybe some debris is in there? It was obvious they have no warranty on their products. I replaced the sights with another brand and type.
That said, I liked the sights and recommend them. But__the way
they offered no solutions__ I didn't want to send them any more of my money.
Stay safe
Poli Viejo